Which action is performed by the gluteus maximus?

Which action is performed by the gluteus maximus?

• A. Lateral Rotation
• B. Extends Thigh
• C. Abducts Thigh
• D. Flexes Thigh

Answer: (B)

Extending the thigh at the hip is the gluteus maximus’ primary action. This large muscle lies on the posterior hip and, when it contracts, pulls the femur backward to straighten the hip, which is essential for standing up, climbing, and sprinting. While its fibers can contribute to lateral rotation when the hip is extended, extension is its main role. Abduction is mainly done by the gluteus medius and minimus, and flexion of the thigh is accomplished by muscles like the iliopsoas and rectus femoris. So extending the thigh best describes what the gluteus maximus does.

Extending the thigh at the hip is the gluteus maximus’ primary action. This large muscle lies on the posterior hip and, when it contracts, pulls the femur backward to straighten the hip, which is essential for standing up, climbing, and sprinting. While its fibers can contribute to lateral rotation when the hip is extended, extension is its main role. Abduction is mainly done by the gluteus medius and minimus, and flexion of the thigh is accomplished by muscles like the iliopsoas and rectus femoris. So extending the thigh best describes what the gluteus maximus does.